Made in Japan, this high precision square is accurate, reliable and well made.
Angle tolerance +/- (20 + ℓ / 10) μm where ℓ is the nominal length (mm)
Annealed tool steel for maximum dimensional stability (not corrosion resistant)
Manufactured in accordance with Japanese Industrial Standards (JIS) B7526 Grade 2
Precision ground measurement surfaces
Please note: Unlike BS939 the Japanese engineering standard B7526 doesn't call for a burr groove at the internal corner.
|Square size||External Measurements (mm)||Accuracy better than|
|50mm||50 x 40 x 10||7 microns (0.27 thou)|
|75mm||75 x 50 x 13||9.5 microns (0.37 thou)|
|100mm||100 x 70 x 15||12 microns (0.47 thou)|
|150mm||150 x 100 x 19||17 microns (0.67 thou)|
|200mm||200 x 130 x 22||22 microns (0.87 thou)|
|250mm||250 x 164 x 22||27 microns (1.06 thou)|
|300mm||300 x 200 x 25||32 microns (1.25 thou)|